Cube

Cube is the industry-leading universal semantic layer designed to bridge the gap between complex data sources and downstream applications, including BI tools, customer-facing dashboards, and Large Language Models (LLMs). Technically, Cube centralizes data modeling, access control, and caching into a unified middleware layer. Its core architecture consists of the Cube Store—a purpose-built, high-performance columnar storage engine—and a multi-protocol API (SQL, REST, GraphQL) that ensures consistency across all consumers. In the 2026 landscape, Cube has pivoted heavily toward 'Semantic Layer for AI,' providing the deterministic context necessary for LLMs to query structured data without hallucinations. By defining metrics, dimensions, and joins in a code-first environment (YAML or JavaScript), organizations can ensure that an AI agent and a human-led dashboard retrieve the exact same revenue or churn figures. Cube’s ability to handle complex pre-aggregations and multi-tenant security at scale makes it the standard for enterprises building RAG-based data agents and real-time analytical products. It supports all major cloud data warehouses including Snowflake, BigQuery, Databricks, and Athena.